I bought a "pre-Breech Lock" kit and wish it was available when I got mine. Bushings with dies preset to pop in and out - how great is that. Next, if you are like me, you will get a Lee Precision Classic Turret press - I got two kits and love them both but I got a "pre -Classic Turret" kit - so I missed out on both innovations. I would for sure get Modern Reloading by Richard Lee if you are using Lee Precision equipment.